JP2566686B2 - Numerical control data generator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes numerical drawing data created by using a CAD system to create numerical control data for use in a laser processing machine, a numerical control (NC) milling machine or the like. The present invention relates to a creation device (CAM system).

With the spread of computer-aided design (CAD) systems, it has become common to use this data effectively to create numerical control data.

In order to process the plate to be processed with high precision, the numerical control data must take into consideration the "processed shape" in addition to the "material" and "thickness" of the work.

[0004]

2. Description of the Related Art A conventional numerical control data generating device is shown in FIG.
As shown in FIG.
When the AD data and the material and thickness of the workpiece are input, the search setting unit 2 searches the processing condition data file 3 to design the processing conditions that match the above material and thickness, and output the numerical value from the output terminal 4. The control data is output.

[0005]

However, in the case of a processing machine using numerical control, the command is given especially when processing is performed at high speed under the influence of the characteristics of the servo motor used and the weight of the processing table. The shape may be different from the shape.

Further, in the sheet metal cutting process using a laser, particularly in a fine shape portion or an acute angle portion, the heat caused by the processing causes alteration, discoloration or deformation.

Therefore, if the processing conditions are uniquely determined only from the material and the thickness of the material to be processed, a change in the processed shape and deterioration of the processing quality will occur.

It is an object of the present invention to provide a numerical control data generating apparatus capable of individually setting machining conditions suitable for each machining shape when generating numerical control data from CAD data.

[0009]

According to a first aspect of the present invention, there is provided a machining condition master file in which machining conditions corresponding to a material and a plate thickness of a workpiece are stored, and the machining condition master file is searched. First search setting means for setting common processing conditions for the entire processed portion of the workpiece, and processing conditions corresponding to the peculiarity of the processed shape in addition to the material and plate thickness of the workpiece are stored. Has the processed processing condition sub file,
A second search setting for searching the processing condition subfile and setting a special processing condition in place of the common processing condition for the processing part having a unique processing shape among the processed parts of the workpiece. It is configured by means.

[0010]

The second search setting means has a function of changing a part of the processing conditions common to all the processing parts that have already been set to a special processing condition.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a numerical control data generating apparatus 10 for a laser processing machine which is an embodiment of the present invention.

Reference numeral 11 is a processing condition master file, which stores data having the contents shown in FIG. This data defines one set condition for each combination of the plate material and plate thickness. These setting conditions are the most standard processing conditions for the material and the plate thickness.

Reference numeral 12 is a processing condition sub-file, which is shown in FIG.
Data having the contents shown in is stored.

In addition to the material and the plate thickness, the peculiarity of the shape is added to the input condition of this data. This shape peculiarity means that the shape is peculiar to the extent that it causes inconvenience when the data of the processing condition master file 10 is applied. For the same combination of material and plate thickness, different shape peculiarities are added and combined. For the input conditions of material, plate thickness and shape peculiarity, setting conditions suitable for these are defined.

Reference numeral 13 denotes an input unit for inputting CAD data of a processing drawing, a material of a plate to be processed, a plate thickness of a plate to be processed, a processing order, and further, if necessary, a shape peculiarity and a processing shape element. Changes are input.

Reference numeral 14 is a first search setting unit, which is a processing condition master file 1 according to the input data ,.
1 is searched, and the processing condition suitable for the data is set. This processing condition is set as a condition common to all processed shape elements of the data. Here, the processing shape element means one unit of the shape to be processed, and means “straight line”, “circle”, “triangle”, “rectangle”, or the like.

A machining order setting unit 15 sets the machining order of each machining shape element in the CAD data based on the data.

Reference numeral 16 denotes a second search and setting unit which searches the processing condition subfile 12 in accordance with the input of the data in addition to the data, and sets the processing conditions suitable for the data.

The processing conditions are set in place of the standard processing conditions set by the first search setting unit 14.

Reference numeral 17 is an output terminal for outputting the numerical control data for the laser processing machine thus created.

In the above configuration, the first search setting unit 14
And the processing condition master file 11 constitutes the first search setting means 18.

The second search setting unit 16 and the processing condition sub-file 12 constitute second search setting means 19.

The above-mentioned apparatus 10 as a whole is constituted by a computer.

Next, a procedure for creating numerical control data by the apparatus 10 having the above configuration will be described.

The case where the processing drawing is that shown in FIG. 4 will be described as an example.

In FIG. 4, reference numerals 30, 31, and 32 respectively represent one processed shape element.

The machined shape element 30 is a circle having a relatively large diameter d, and is normally cut under standard machining conditions.

The machining shape element 31 is a triangle having a small apex angle α, and the influence of heat when cutting one hypotenuse extends to another hypotenuse, so that the energy condition is lower than the standard machining conditions. It is desirable to do.

The processed shape element 32 has a shape obtained by adding a triangular element 32b to a rectangular element 32a.

Standard processing conditions apply to the rectangular element 32a. Special processing conditions apply to the triangular element 32b.

The numerical control data is created by the procedure shown in FIG.

First, the operator inputs the CAD data of each machining shape element 30, 31, 32 in the machining diagram of FIG. 4 (step 40).

Subsequently, the operator also inputs the "material" (for example, SUS) and the "plate thickness" (for example, 1.00) of the plate to be processed (step 41).

As a result, the apparatus 10 operates, performs step 42, calls the machining condition master file 11,
The processing conditions suitable for the above "SUS, 1.00" are retrieved from this file 11 and the processing conditions of item 1 in FIG. 2 are set.

As a result, the most standard machining conditions for "SUS, 1.00" are the above-mentioned machining shape elements 30, 3
It is set as a common condition for all 1 and 32.

When the processing conditions are set, the operator designates the processing order of the processing condition shape elements 30, 31, 32 in the order of 30 → 31 → 32 (step 4).
3).

Next, the operator designates a machining shape element for which the above-mentioned machining conditions need to be changed, for example, the machining shape element 31 in FIG. 4, for one machining shape element (step 44). .

Next, the peculiarity of the shape of the processed shape element 31 (for example, "shape 2" in FIG. 3) is specified, and the above "material" (SUS) and "plate thickness" (1.00) are specified. Input (step 45). Regarding the uniqueness of this shape,
The shape is grasped in advance by the operator for each shape.

When the above designation is made, the apparatus 10 operates, step 46 is executed, the machining condition subfile 12 is called, and "SUS, 1.0
0, shape 2 ”is searched for, and the special processing condition of item 2 in FIG. 3 is set. As a result, the processing conditions for only the processed shape element 31 among the processed shape elements 30, 31, 32 are changed.

Next, the operator designates a machining shape element whose machining condition needs to be changed for a part of one machining shape element, for example, the machining shape element 32 in FIG. 4 (step 47).

Then, on the machining line of the machining shape element 32, machining condition change points P ₁ and P ₂ which are the start point and the end point of the section where the machining condition is desired to be changed are designated (step 48).

Then, the section for which the machining condition is desired to be changed, that is, the triangular element 32b existing between the points P ₁ and P ₂ is designated (step 49).

When the machining shape element is a closed loop like the machining shape element indicated by reference numeral 32 in FIG. 4, of the two parts divided by the points P ₁ and P ₂ of one machining shape element, It is difficult to know which part the processing conditions are changed to. Therefore, in this embodiment, as shown by the broken line in FIG. 4, the color is changed in the section in which the processing condition is desired to be changed. This makes it possible to specify the processing condition change section without error.

Then, the peculiarity of the shape of the triangular element 32b (for example, "shape 3" in FIG. 3) is designated, and "material" (SUS) and "plate thickness" (1.00) are input ( Step 50).

When the above designation is made, the apparatus 10 operates, performs step 51, calls the processing condition sub-file 12, and reads "SUS, 1.0" from this file 12.
0, shape 3 ”is searched for, and the processing condition of item 3 in FIG. 3 is set.

As a result, of the processed shape elements 32,
The processing condition of the triangular element 32b is changed.

As described above, the machining conditions are arranged in the order of the machining shape elements 30, 31, 32 in the machining diagram of FIG. 4, and the machining shape element 30 has the machining conditions of item 1 of the main file of FIG. For the machining shape element 31, the machining condition of item 2 of the subfile of FIG. 3, the machining element 32 of the rectangular element 32a is the machining condition of item 1 of the main file of FIG. 2, and the part of the triangular element 32b is Numerical control data that is the processing condition of item 3 of the subfile of FIG. 3 is created.

The created numerical control data is input to the laser processing machine.

In the laser processing machine, the set material is SU
S, a laser is scanned on a metal plate having a thickness of 1.00 mm in the order of the machined shape elements 30, 31, 32 in FIG. 4, and the whole machined shape element 30 and the rectangular element 32 a of the machined shape elements 32. Is irradiated with a laser having a standard energy condition, and the entire machining condition element 31 and the triangular element 32b of the machining shape element 32 are irradiated with a laser having a special energy condition.

As a result, the SUS plate having a thickness of 1.00 mm is cut with high precision and quality.

It should be noted that the processing condition sub-file is configured to have the shape peculiarity in the comment field of the setting condition, the information of the sub-file is displayed on the screen, and the shape peculiarity is designated by the operator on the screen. It can also be configured.

Numerical control data for the NC milling machine is created in the same manner as above.

[0053]

As described above, according to the first aspect of the present invention, it is possible to set the processing conditions suitable for each of the plurality of processed parts, whereby the processing conditions for each processed part can be set. Optimal numerical control data can be created.

Further, first, a common machining condition is set for all of the plurality of machining parts, and thereafter, a special machining condition is set for the machining part having a peculiar shape and replaced with the common machining condition. Because of the configuration, the numerical control data can be created efficiently.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a numerical control data creation device of the present invention.

FIG. 2 is a diagram showing the contents of a processing condition master file in FIG.

FIG. 3 is a diagram showing the contents of a processing condition subfile in FIG.

FIG. 4 is a diagram showing an example of a processed drawing.

5 is a flowchart showing a procedure for creating numerical control data by the apparatus of FIG.

FIG. 6 is a diagram showing an example of a conventional numerical control data creation device.

[Explanation of symbols]

 10 Numerical Control Data Generation Device 11 Machining Condition Master File 12 Machining Condition Subfile 13 Input Section 14 First Search Setting Section 15 Machining Order Setting Section 16 Second Search Setting Section 17 Output Terminal 18 First Search Setting Means 19th 2 search setting means 30, 31, 32 machining shape element 32a rectangular element 32b triangular element 40 to 51 steps

Claims (1)

(57) [Claims] 1. A machining condition master file (11) in which machining conditions corresponding to a material and a plate thickness of a workpiece are stored, and the machining condition master file is searched to process a portion of the workpiece. A first search setting means (18) for setting a common machining condition for all of the machining conditions and a machining condition sub-stored with machining conditions corresponding to the peculiarity of the machining shape in addition to the material and plate thickness of the workpiece. The file (12) is searched, the processing condition sub-file is searched, and a special processing condition is used instead of the common processing condition for a processing part having a specific processing shape among the processed parts of the workpiece. Second to set
Numerical control data creation device characterized by comprising a search setting means (19).